package cn.com.hbhgkj.web;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

public class SetEncodingFilter implements Filter{
	// default character encoding
	String defaultEncoding = "UTF-8";

	public void init(FilterConfig config) throws ServletException {
	   String encoding = config.getInitParameter("encoding");
	   if (encoding != null) {
	    defaultEncoding = encoding;
	   }
	}

	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
	   request.setCharacterEncoding(defaultEncoding);
	   chain.doFilter(request, response);
	}

	public void destroy() {
	   defaultEncoding = null;
	}
}
